DDS to FITS Converter
Processing entirely on your device — large files may take a moment.
DDS is the DirectDraw Surface texture format of DirectX game pipelines — uncompressed BGRA variants are the universal fallback that every engine and texture tool imports. Convert FITS frames to PNG or JPG to preview telescope data, or pack them into a ZIP for sharing.
iLoveConverter processes everything locally on your computer, which makes it private and fast: no upload wait, no server storage, no limits. Add as many files as you like — batch conversion is built in.
How to convert DDS to FITS
- 1
Select your files
Drag & drop your DDS files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to FITS". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted FITS file individually, or grab everything at once as a ZIP archive.
About the DDS format
DDS is the DirectDraw Surface texture format of DirectX game pipelines. This converter writes the uncompressed 32-bit BGRA variant — the universal fallback every engine's importer accepts before any compressed codec.
Mipmaps and block compression (BC1-7) are not written; the file is a flat full-resolution BGRA image with a classic DX header.
+Strengths
- ✓Universal engine-import fallback
- ✓Lossless, full alpha channel
- ✓No codec negotiation needed
!Limitations
- −No mipmap chain written
- −Uncompressed = large files
- −BC compressed variants not written
About the FITS format
FITS (Flexible Image Transport System) has carried professional astronomy data since 1981: every file opens with a plain-text header that records telescope, instrument, exposure, filters and world coordinates, followed by raw pixel arrays — often 16-bit or float, sometimes data cubes.
Values can be negative or far above display range, so FITS never looks right in a photo viewer. Converting to PNG applies a simple scaling pass that reveals the nebula or galaxy in the numbers — good for previews, while science pipelines keep the original.
+Strengths
- ✓Self-documenting science headers
- ✓High bit depth (16/32-bit, float)
- ✓The standard of every observatory
!Limitations
- −Not display-ready
- −Files are large and uncompressed
Why convert DDS to FITS?
Think of it as moving your file to the container that fits the job. No mipmap chain written FITS works differently: Self-documenting science headers If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this DDS to FITS converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Will I lose quality converting DDS to FITS?
No — FITS is a lossless format, so every pixel of the converted image matches your original DDS file. You can also adjust the quality/size balance before converting when the target format supports compression.
What happens to EXIF data and other metadata?
Conversions here re-encode the image, and re-encoding generally does not carry the original metadata over. If the EXIF data of your DDS files matters (camera model, GPS, timestamps), keep the original file as the master and treat the converted copy as the shareable version.
Can I convert several DDS files at once?
Yes — drop as many files as you like into the tool and they are converted in one batch. When more than one file comes out, everything is bundled into a ZIP for a single download.